US Democratic presidential candidate and US Senator Barack Obama speaks at a town hall meeting at the Mapleton Expeditionary School of the Arts in Thornton

 
US Democratic presidential candidate and US Senator Barack Obama speaks at a town hall meeting at the Mapleton Expeditionary School of the Arts in Thornton
Students listen to US Democratic presidential candidate and US Senator Barack Obama (D-IL) speaking at a town hall meeting at the Mapleton Expeditionary School of the Arts in Thornton, Colorado May 28, 2008. REUTERS/Rick Wilking (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)